#include<stdlib.h>
#include<stdio.h>
void main()
{
	int a, b, r1, r2, r3, r4, r5;
	printf("please input:\n");
	scanf("%d,%d", &a, &b);
	r1 = a + b;
	r2 = a - b;
	r3 = a * b;
	r4 = a / b;
	r5 = a % b;
	printf("a+b=%d\n", r1);
	printf("a-b=%d\n", r2);
	printf("a*b=%d\n", r3);
	printf("a/b=%d\n", r4);
	printf("a%b=%d\n", r5);
	system("pause");
	//return;
}

